Useless "cleaning" of local variables

[aka-sps]

For example:

marss-riscv/src/riscvsim/inorder.c

Lines 134 to 139 in a7fac76

	void
	in_core_free(void *core_type)
	{
	INCore *core;
	core = (INCore *)(*(INCore **)core_type);

marss-riscv/src/riscvsim/inorder.c

Lines 151 to 152 in a7fac76

	core = NULL;
	}